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Subject: ARM v8 rte_power_pause
Date: Wed, 3 Jun 2026 13:56:04 +0200
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Thread-Topic: ARM v8 rte_power_pause
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From: =?iso-8859-1?Q?Morten_Br=F8rup?= <mb@smartsharesystems.com>
To: "Wathsala Vithanage" <wathsala.vithanage@arm.com>,
 "Hemant Agrawal" <hemant.agrawal@nxp.com>,
 "Sachin Saxena" <sachin.saxena@oss.nxp.com>
Cc: <dev@dpdk.org>,
	"Maxime Leroy" <maxime@leroys.fr>
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Hi Wathsala, Hemant and Sachin,

Over at the Grout project, we are discussing power management in the =
context of 100 Gbit/s latency deadlines [1].

rte_power_pause() is not implemented for ARM v8 / Cortex-A72.
Syscalls such as nanosleep() have too much overhead, and cannot be used.

Any suggestions for a power-reducing method to make a CPU core "sleep" =
(i.e. do nothing) for durations in the order of 1 microsecond?

[1]: https://github.com/DPDK/grout/pull/624#issuecomment-4602036364

-Morten